You’ve already told us which small-screen pairs sizzle, now let’s move on to the big-screen. Which movie duo has the BEST chemistry of all time? From Pretty Woman’s Julia Roberts and Richard Gere to Iron Man’s Robert Downey Jr. & Gwyneth Paltrow, and of course, Silver Linings Playbook stars Bradley Cooper and Jennifer Lawrence, the responses on Twitter have been varied, so we thought it was time to expand the conversation.

Which pair has the most sparks? And what makes them so great? Tell us in the comments.